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arXiv · 1010.5757

CMB Neutrino Mass Bounds and Reionization

Maria Archidiacono·Asantha Cooray·Alessandro Melchiorri·Stefania Pandolfi
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Abstract

Current cosmic microwave background (CMB) bounds on the sum of the neutrino masses assume a sudden reionization scenario described by a single parameter that determines the onset of reionization. We investigate the bounds on the neutrino mass in a more general reionization scenario based on a principal component approach. We found the constraint on the sum of the neutrino masses from CMB data can be relaxed by a $\sim$40% in a generalized reionization scenario. Moreover, the amplitude of the r.m.s. mass fluctuations $σ_8$ is also considerably lower providing a better consistency with a low amplitude of the Sunyaev-Zel'dovich signal.

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Maria Archidiacono, Asantha Cooray, Alessandro Melchiorri, Stefania Pandolfi. 2010-10-27. CMB Neutrino Mass Bounds and Reionization. https://doi.org/10.1103/physrevd.82.087302

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